The perinatal birth defects stood on the first 5 rank of incidence list followed by cheiloschisis, cleft lip and cleft palate, hypospadia, congenital hydrocephalus and congenital heart disease.

• 出生缺陷分类构成的顺位前5位依次为唇裂、唇裂合并腭裂、尿道下裂、先天性脑积水及先天性心脏病；